Fix rule sync2

[lhy1024]

What problem does this PR solve?

Issue Number: Close #xxx

What is changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has the configuration change
• Has HTTP API interfaces changed (Don't forget to add the declarative for the new API)
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• PR to update pingcap/tiup:
• Need to cherry-pick to the release branch

Release note

None.

[codecov-commenter]

Codecov Report

Merging #32 (fc1ef82) into master (86831ce) will increase coverage by 0.25%.
Report is 49 commits behind head on master.
The diff coverage is 76.22%.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #32      +/-   ##
==========================================
+ Coverage   74.29%   74.55%   +0.25%     
==========================================
  Files         451      453       +2     
  Lines       48863    50117    +1254     
==========================================
+ Hits        36305    37364    +1059     
- Misses       9349     9414      +65     
- Partials     3209     3339     +130     

Flag	Coverage Δ
unittests	74.55% <76.22%> (+0.25%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.